altitude

/ˈæltəˌtud/

elevation especially above sea level or above the earth's surface

Chinese meaning: 海拔；高度

The plane reached a cruising altitude of 35,000 feet.

飞机达到了35,000英尺的巡航高度。

At high altitude, the air pressure is lower and breathing becomes difficult.

在高海拔地区，气压较低，呼吸变得困难。